Mercurial > hg > octave-nkf
annotate src/utils.cc @ 7481:78f3811155f7
use exceptions in liboctave error handler
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 14 Feb 2008 17:14:23 -0500 |
| parents | a1dbe9d80eee |
| children | 82be108cc558 |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 2002, 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 240 | 24 #ifdef HAVE_CONFIG_H |
| 1192 | 25 #include <config.h> |
| 1 | 26 #endif |
| 27 | |
| 3716 | 28 #include <cerrno> |
| 1343 | 29 #include <climits> |
| 1346 | 30 #include <cstring> |
| 1343 | 31 |
| 3503 | 32 #include <fstream> |
| 33 #include <iostream> | |
| 1728 | 34 #include <string> |
| 35 | |
| 1350 | 36 #ifdef HAVE_UNISTD_H |
| 2442 | 37 #ifdef HAVE_SYS_TYPES_H |
| 1 | 38 #include <sys/types.h> |
| 2442 | 39 #endif |
| 1 | 40 #include <unistd.h> |
| 41 #endif | |
| 367 | 42 |
| 4302 | 43 #include "quit.h" |
| 44 | |
| 3040 | 45 #include "dir-ops.h" |
| 46 #include "file-ops.h" | |
| 2926 | 47 #include "file-stat.h" |
| 4732 | 48 #include "lo-mappers.h" |
| 1651 | 49 #include "oct-cmplx.h" |
| 2926 | 50 #include "oct-env.h" |
| 3040 | 51 #include "pathsearch.h" |
| 1755 | 52 #include "str-vec.h" |
| 1651 | 53 |
| 4216 | 54 #include "Cell.h" |
| 2492 | 55 #include <defaults.h> |
| 1352 | 56 #include "defun.h" |
| 57 #include "dirfns.h" | |
| 58 #include "error.h" | |
| 59 #include "gripes.h" | |
| 60 #include "input.h" | |
| 5832 | 61 #include "load-path.h" |
| 5465 | 62 #include "oct-errno.h" |
| 1742 | 63 #include "oct-hist.h" |
| 1750 | 64 #include "oct-obj.h" |
| 1352 | 65 #include "pager.h" |
| 1690 | 66 #include "sysdep.h" |
| 1750 | 67 #include "toplev.h" |
| 1 | 68 #include "unwind-prot.h" |
| 1352 | 69 #include "utils.h" |
| 70 #include "variables.h" | |
| 1 | 71 |
| 4143 | 72 // Return TRUE if S is a valid identifier. |
| 73 | |
| 74 bool | |
| 75 valid_identifier (const char *s) | |
| 76 { | |
| 5290 | 77 if (! s || ! (isalpha (*s) || *s == '_' || *s == '$')) |
| 4143 | 78 return false; |
| 79 | |
| 80 while (*++s != '\0') | |
| 5290 | 81 if (! (isalnum (*s) || *s == '_' || *s == '$')) |
| 4143 | 82 return false; |
| 83 | |
| 84 return true; | |
| 85 } | |
| 86 | |
| 87 bool | |
| 88 valid_identifier (const std::string& s) | |
| 89 { | |
| 90 return valid_identifier (s.c_str ()); | |
| 91 } | |
| 92 | |
| 4264 | 93 DEFCMD (isvarname, args, , |
| 5040 | 94 "-*- texinfo -*-\n\ |
| 95 @deftypefn {Built-in Function} {} isvarname (@var{name})\n\ | |
| 4264 | 96 Return true if @var{name} is a valid variable name\n\ |
| 97 @end deftypefn") | |
| 98 { | |
| 99 octave_value retval; | |
| 100 | |
| 101 int argc = args.length () + 1; | |
| 102 | |
| 4610 | 103 string_vector argv = args.make_argv ("isvarname"); |
| 4264 | 104 |
| 105 if (error_state) | |
| 106 return retval; | |
| 107 | |
| 108 if (argc == 2) | |
| 109 retval = valid_identifier (argv[1]); | |
| 110 else | |
| 5823 | 111 print_usage (); |
| 4264 | 112 |
| 113 return retval; | |
| 114 } | |
| 115 | |
| 6323 | 116 // Return TRUE if F and G are both names for the same file. |
| 117 | |
| 118 bool | |
| 119 same_file (const std::string& f, const std::string& g) | |
| 120 { | |
| 6598 | 121 return same_file_internal (f, g); |
| 6323 | 122 } |
| 123 | |
| 1 | 124 int |
| 3523 | 125 almost_match (const std::string& std, const std::string& s, int min_match_len, |
| 526 | 126 int case_sens) |
| 1 | 127 { |
| 1755 | 128 int stdlen = std.length (); |
| 129 int slen = s.length (); | |
| 1 | 130 |
| 131 return (slen <= stdlen | |
| 132 && slen >= min_match_len | |
| 287 | 133 && (case_sens |
| 1755 | 134 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
| 3350 | 135 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
| 287 | 136 } |
| 137 | |
| 581 | 138 // Ugh. |
| 139 | |
| 287 | 140 int |
| 3523 | 141 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
| 287 | 142 int min_toks_to_match, int max_toks) |
| 143 { | |
| 144 int status = 0; | |
| 145 int tok_count = 0; | |
| 146 int toks_matched = 0; | |
| 147 | |
| 1755 | 148 if (s.empty () || max_toks < 1) |
| 287 | 149 return status; |
| 150 | |
| 1755 | 151 char *kw = strsave (s.c_str ()); |
| 287 | 152 |
| 153 char *t = kw; | |
| 154 while (*t != '\0') | |
| 155 { | |
| 156 if (*t == '\t') | |
| 157 *t = ' '; | |
| 158 t++; | |
| 159 } | |
| 160 | |
| 161 char *beg = kw; | |
| 162 while (*beg == ' ') | |
| 163 beg++; | |
| 164 | |
| 165 if (*beg == '\0') | |
| 166 return status; | |
| 167 | |
| 168 | |
| 3072 | 169 const char **to_match = new const char * [max_toks + 1]; |
| 170 const char * const *s1 = std; | |
| 171 const char **s2 = to_match; | |
| 287 | 172 |
| 526 | 173 if (! s1 || ! s2) |
| 287 | 174 goto done; |
| 175 | |
| 176 s2[tok_count] = beg; | |
| 177 char *end; | |
| 526 | 178 while ((end = strchr (beg, ' ')) != 0) |
| 287 | 179 { |
| 180 *end = '\0'; | |
| 181 beg = end + 1; | |
| 182 | |
| 183 while (*beg == ' ') | |
| 184 beg++; | |
| 185 | |
| 186 if (*beg == '\0') | |
| 187 break; | |
| 188 | |
| 189 tok_count++; | |
| 190 if (tok_count >= max_toks) | |
| 191 goto done; | |
| 192 | |
| 193 s2[tok_count] = beg; | |
| 194 } | |
| 526 | 195 s2[tok_count+1] = 0; |
| 287 | 196 |
| 197 s2 = to_match; | |
| 198 | |
| 199 for (;;) | |
| 200 { | |
| 201 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) | |
| 202 goto done; | |
| 203 | |
| 204 toks_matched++; | |
| 205 | |
| 206 s1++; | |
| 207 s2++; | |
| 208 | |
| 209 if (! *s2) | |
| 210 { | |
| 211 status = (toks_matched >= min_toks_to_match); | |
| 212 goto done; | |
| 213 } | |
| 214 | |
| 215 if (! *s1) | |
| 216 goto done; | |
| 217 } | |
| 218 | |
| 219 done: | |
| 220 | |
| 221 delete [] kw; | |
| 222 delete [] to_match; | |
| 223 | |
| 224 return status; | |
| 1 | 225 } |
| 226 | |
| 2234 | 227 // Return non-zero if either NR or NC is zero. Return -1 if this |
| 228 // should be considered fatal; return 1 if this is ok. | |
| 229 | |
| 230 int | |
| 5275 | 231 empty_arg (const char * /* name */, octave_idx_type nr, octave_idx_type nc) |
| 2234 | 232 { |
| 4478 | 233 return (nr == 0 || nc == 0); |
| 2234 | 234 } |
| 235 | |
| 581 | 236 // See if the given file is in the path. |
| 237 | |
| 3536 | 238 std::string |
| 4243 | 239 search_path_for_file (const std::string& path, const string_vector& names) |
| 686 | 240 { |
| 3174 | 241 dir_path p (path); |
| 686 | 242 |
| 4243 | 243 return octave_env::make_absolute (p.find_first_of (names), |
| 244 octave_env::getcwd ()); | |
| 686 | 245 } |
| 246 | |
| 4216 | 247 // Find all locations of the given file in the path. |
| 248 | |
| 249 string_vector | |
| 4243 | 250 search_path_for_all_files (const std::string& path, const string_vector& names) |
| 4216 | 251 { |
| 252 dir_path p (path); | |
| 253 | |
| 4243 | 254 string_vector sv = p.find_all_first_of (names); |
| 4216 | 255 |
| 6379 | 256 octave_idx_type len = sv.length (); |
| 4216 | 257 |
| 6379 | 258 for (octave_idx_type i = 0; i < len; i++) |
| 4216 | 259 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
| 260 | |
| 261 return sv; | |
| 262 } | |
| 263 | |
| 264 static string_vector | |
| 265 make_absolute (const string_vector& sv) | |
| 266 { | |
| 6379 | 267 octave_idx_type len = sv.length (); |
| 268 | |
| 269 string_vector retval (len); | |
| 4216 | 270 |
| 6379 | 271 for (octave_idx_type i = 0; i < len; i++) |
| 272 retval[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); | |
| 273 | |
| 274 return retval; | |
| 4216 | 275 } |
| 276 | |
| 3195 | 277 DEFUN (file_in_loadpath, args, , |
| 3446 | 278 "-*- texinfo -*-\n\ |
| 4216 | 279 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
| 280 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ | |
| 3195 | 281 \n\ |
| 5448 | 282 Return the absolute name of @var{file} if it can be found in\n\ |
| 5814 | 283 the list of directories specified by @code{path}.\n\ |
| 4216 | 284 If no file is found, return an empty matrix.\n\ |
| 285 \n\ | |
| 5448 | 286 If the first argument is a cell array of strings, search each\n\ |
| 4243 | 287 directory of the loadpath for element of the cell array and return\n\ |
| 288 the first that matches.\n\ | |
| 289 \n\ | |
| 4216 | 290 If the second optional argument @code{\"all\"} is supplied, return\n\ |
| 291 a cell array containing the list of all files that have the same\n\ | |
| 292 name in the path. If no files are found, return an empty cell array.\n\ | |
| 5814 | 293 @seealso{file_in_path, path}\n\ |
| 5642 | 294 @end deftypefn") |
| 3195 | 295 { |
| 4216 | 296 octave_value retval; |
| 3195 | 297 |
| 4243 | 298 int nargin = args.length (); |
| 3195 | 299 |
| 4243 | 300 if (nargin == 1 || nargin == 2) |
| 4216 | 301 { |
| 4243 | 302 string_vector names = args(0).all_strings (); |
| 303 | |
| 304 if (! error_state && names.length () > 0) | |
| 305 { | |
| 306 if (nargin == 1) | |
| 307 { | |
| 308 std::string fname = octave_env::make_absolute | |
| 5832 | 309 (load_path::find_first_of (names), octave_env::getcwd ()); |
| 4243 | 310 |
| 311 if (fname.empty ()) | |
| 312 retval = Matrix (); | |
| 313 else | |
| 314 retval = fname; | |
| 315 } | |
| 316 else if (nargin == 2) | |
| 317 { | |
| 318 std::string opt = args(1).string_value (); | |
| 319 | |
| 320 if (! error_state && opt == "all") | |
| 5832 | 321 retval = Cell (make_absolute (load_path::find_all_first_of (names))); |
| 4243 | 322 else |
| 4249 | 323 error ("file_in_loadpath: invalid option"); |
| 4243 | 324 } |
| 325 } | |
| 4216 | 326 else |
| 4243 | 327 error ("file_in_loadpath: expecting string as first argument"); |
| 4216 | 328 } |
| 3195 | 329 else |
| 5823 | 330 print_usage (); |
| 3195 | 331 |
| 332 return retval; | |
| 333 } | |
| 334 | |
| 1957 | 335 DEFUN (file_in_path, args, , |
| 3301 | 336 "-*- texinfo -*-\n\ |
| 337 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ | |
| 4216 | 338 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
| 5448 | 339 Return the absolute name of @var{file} if it can be found in\n\ |
| 3301 | 340 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
| 5814 | 341 directories in the format described for @code{path}. If no file\n\ |
| 5794 | 342 is found, return an empty matrix. For example,\n\ |
| 3301 | 343 \n\ |
| 344 @example\n\ | |
| 5456 | 345 file_in_path (EXEC_PATH, \"sh\")\n\ |
| 346 @result{} \"/bin/sh\"\n\ | |
| 3301 | 347 @end example\n\ |
| 4216 | 348 \n\ |
| 5448 | 349 If the second argument is a cell array of strings, search each\n\ |
| 4243 | 350 directory of the path for element of the cell array and return\n\ |
| 351 the first that matches.\n\ | |
| 352 \n\ | |
| 4216 | 353 If the third optional argument @code{\"all\"} is supplied, return\n\ |
| 354 a cell array containing the list of all files that have the same\n\ | |
| 355 name in the path. If no files are found, return an empty cell array.\n\ | |
| 4249 | 356 @seealso{file_in_loadpath}\n\ |
| 3301 | 357 @end deftypefn") |
| 686 | 358 { |
| 4216 | 359 octave_value retval; |
| 686 | 360 |
| 4243 | 361 int nargin = args.length (); |
| 1755 | 362 |
| 4243 | 363 if (nargin == 2 || nargin == 3) |
| 686 | 364 { |
| 4243 | 365 std::string path = args(0).string_value (); |
| 366 | |
| 367 if (! error_state) | |
| 368 { | |
| 4249 | 369 string_vector names = args(1).all_strings (); |
| 4243 | 370 |
| 371 if (! error_state && names.length () > 0) | |
| 372 { | |
| 373 if (nargin == 2) | |
| 374 { | |
| 375 std::string fname = search_path_for_file (path, names); | |
| 686 | 376 |
| 4243 | 377 if (fname.empty ()) |
| 378 retval = Matrix (); | |
| 379 else | |
| 380 retval = fname; | |
| 381 } | |
| 382 else if (nargin == 3) | |
| 383 { | |
| 4249 | 384 std::string opt = args(2).string_value (); |
| 4243 | 385 |
| 386 if (! error_state && opt == "all") | |
| 387 retval = Cell (make_absolute (search_path_for_all_files (path, names))); | |
| 388 else | |
| 4249 | 389 error ("file_in_path: invalid option"); |
| 4243 | 390 } |
| 391 } | |
| 392 else | |
| 393 error ("file_in_path: expecting string as second argument"); | |
| 394 } | |
| 1755 | 395 else |
| 4243 | 396 error ("file_in_path: expecting string as first argument"); |
| 686 | 397 } |
| 398 else | |
| 5823 | 399 print_usage (); |
| 686 | 400 |
| 401 return retval; | |
| 402 } | |
| 403 | |
| 3536 | 404 std::string |
| 3523 | 405 file_in_path (const std::string& name, const std::string& suffix) |
| 526 | 406 { |
| 3523 | 407 std::string nm = name; |
| 526 | 408 |
| 1755 | 409 if (! suffix.empty ()) |
| 410 nm.append (suffix); | |
| 686 | 411 |
| 5832 | 412 return octave_env::make_absolute |
| 413 (load_path::find_file (nm), octave_env::getcwd ()); | |
| 526 | 414 } |
| 415 | |
| 581 | 416 // See if there is an function file in the path. If so, return the |
| 417 // full path to the file. | |
| 418 | |
| 3536 | 419 std::string |
| 3523 | 420 fcn_file_in_path (const std::string& name) |
| 526 | 421 { |
| 3523 | 422 std::string retval; |
| 908 | 423 |
| 1755 | 424 int len = name.length (); |
| 425 | |
| 426 if (len > 0) | |
| 427 { | |
| 5832 | 428 if (octave_env::absolute_pathname (name)) |
| 429 { | |
| 430 file_stat fs (name); | |
| 431 | |
| 432 if (fs.exists ()) | |
| 433 retval = name; | |
| 434 } | |
| 435 else if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') | |
| 436 retval = load_path::find_fcn_file (name.substr (0, len-2)); | |
| 908 | 437 else |
| 5832 | 438 retval = load_path::find_fcn_file (name); |
| 908 | 439 } |
| 1755 | 440 |
| 441 return retval; | |
| 526 | 442 } |
| 443 | |
| 5864 | 444 // See if there is a .oct file in the path. If so, return the |
| 581 | 445 // full path to the file. |
| 446 | |
| 3536 | 447 std::string |
| 3523 | 448 oct_file_in_path (const std::string& name) |
| 572 | 449 { |
| 3523 | 450 std::string retval; |
| 908 | 451 |
| 1755 | 452 int len = name.length (); |
| 453 | |
| 454 if (len > 0) | |
| 455 { | |
| 5832 | 456 if (octave_env::absolute_pathname (name)) |
| 457 { | |
| 458 file_stat fs (name); | |
| 459 | |
| 460 if (fs.exists ()) | |
| 461 retval = name; | |
| 462 } | |
| 463 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'o' | |
| 464 && name [len - 2] == 'c' && name [len - 1] == 't') | |
| 465 retval = load_path::find_oct_file (name.substr (0, len-4)); | |
| 908 | 466 else |
| 5832 | 467 retval = load_path::find_oct_file (name); |
| 908 | 468 } |
| 1755 | 469 |
| 470 return retval; | |
| 572 | 471 } |
| 472 | |
| 5864 | 473 // See if there is a .mex file in the path. If so, return the |
| 474 // full path to the file. | |
| 475 | |
| 476 std::string | |
| 477 mex_file_in_path (const std::string& name) | |
| 478 { | |
| 479 std::string retval; | |
| 480 | |
| 481 int len = name.length (); | |
| 482 | |
| 483 if (len > 0) | |
| 484 { | |
| 485 if (octave_env::absolute_pathname (name)) | |
| 486 { | |
| 487 file_stat fs (name); | |
| 488 | |
| 489 if (fs.exists ()) | |
| 490 retval = name; | |
| 491 } | |
| 492 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'm' | |
| 493 && name [len - 2] == 'e' && name [len - 1] == 'x') | |
| 494 retval = load_path::find_mex_file (name.substr (0, len-4)); | |
| 495 else | |
| 496 retval = load_path::find_mex_file (name); | |
| 497 } | |
| 498 | |
| 499 return retval; | |
| 500 } | |
| 501 | |
| 3103 | 502 // Replace backslash escapes in a string with the real values. |
| 503 | |
| 3536 | 504 std::string |
| 3523 | 505 do_string_escapes (const std::string& s) |
| 3103 | 506 { |
| 3523 | 507 std::string retval; |
| 3103 | 508 |
| 509 size_t i = 0; | |
| 510 size_t j = 0; | |
| 511 size_t len = s.length (); | |
| 512 | |
| 513 retval.resize (len); | |
| 514 | |
| 515 while (j < len) | |
| 516 { | |
| 517 if (s[j] == '\\' && j+1 < len) | |
| 518 { | |
| 519 switch (s[++j]) | |
| 520 { | |
| 3893 | 521 case '0': |
| 522 retval[i] = '\0'; | |
| 523 break; | |
| 524 | |
| 3103 | 525 case 'a': |
| 526 retval[i] = '\a'; | |
| 527 break; | |
| 528 | |
| 529 case 'b': // backspace | |
| 530 retval[i] = '\b'; | |
| 531 break; | |
| 532 | |
| 533 case 'f': // formfeed | |
| 534 retval[i] = '\f'; | |
| 535 break; | |
| 536 | |
| 537 case 'n': // newline | |
| 538 retval[i] = '\n'; | |
| 539 break; | |
| 540 | |
| 541 case 'r': // carriage return | |
| 542 retval[i] = '\r'; | |
| 543 break; | |
| 544 | |
| 545 case 't': // horizontal tab | |
| 546 retval[i] = '\t'; | |
| 547 break; | |
| 548 | |
| 549 case 'v': // vertical tab | |
| 550 retval[i] = '\v'; | |
| 551 break; | |
| 552 | |
| 553 case '\\': // backslash | |
| 554 retval[i] = '\\'; | |
| 555 break; | |
| 556 | |
| 557 case '\'': // quote | |
| 558 retval[i] = '\''; | |
| 559 break; | |
| 560 | |
| 561 case '"': // double quote | |
| 562 retval[i] = '"'; | |
| 563 break; | |
| 564 | |
| 565 default: | |
| 566 warning ("unrecognized escape sequence `\\%c' --\ | |
| 567 converting to `%c'", s[j], s[j]); | |
| 568 retval[i] = s[j]; | |
| 569 break; | |
| 570 } | |
| 571 } | |
| 572 else | |
| 573 { | |
| 574 retval[i] = s[j]; | |
| 575 } | |
| 576 | |
| 577 i++; | |
| 578 j++; | |
| 579 } | |
| 580 | |
| 3105 | 581 retval.resize (i); |
| 3103 | 582 |
| 583 return retval; | |
| 584 } | |
| 585 | |
| 586 DEFUN (do_string_escapes, args, , | |
| 3446 | 587 "-*- texinfo -*-\n\ |
| 588 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ | |
| 589 Convert special characters in @var{string} to their escaped forms.\n\ | |
| 590 @end deftypefn") | |
| 3103 | 591 { |
| 592 octave_value retval; | |
| 593 | |
| 594 int nargin = args.length (); | |
| 595 | |
| 596 if (nargin == 1) | |
| 597 { | |
| 598 if (args(0).is_string ()) | |
| 599 retval = do_string_escapes (args(0).string_value ()); | |
| 600 else | |
| 601 error ("do_string_escapes: argument must be a string"); | |
| 602 } | |
| 603 else | |
| 5823 | 604 print_usage (); |
| 3103 | 605 |
| 606 return retval; | |
| 607 } | |
| 608 | |
| 1755 | 609 const char * |
| 801 | 610 undo_string_escape (char c) |
| 611 { | |
| 612 if (! c) | |
| 1755 | 613 return ""; |
| 801 | 614 |
| 615 switch (c) | |
| 616 { | |
| 3893 | 617 case '\0': |
| 618 return "\\0"; | |
| 619 | |
| 801 | 620 case '\a': |
| 621 return "\\a"; | |
| 622 | |
| 623 case '\b': // backspace | |
| 624 return "\\b"; | |
| 625 | |
| 626 case '\f': // formfeed | |
| 627 return "\\f"; | |
| 628 | |
| 629 case '\n': // newline | |
| 630 return "\\n"; | |
| 631 | |
| 632 case '\r': // carriage return | |
| 633 return "\\r"; | |
| 634 | |
| 635 case '\t': // horizontal tab | |
| 636 return "\\t"; | |
| 637 | |
| 638 case '\v': // vertical tab | |
| 639 return "\\v"; | |
| 640 | |
| 641 case '\\': // backslash | |
| 642 return "\\\\"; | |
| 643 | |
| 644 case '"': // double quote | |
| 645 return "\\\""; | |
| 646 | |
| 647 default: | |
| 1755 | 648 { |
| 649 static char retval[2]; | |
| 650 retval[0] = c; | |
| 651 retval[1] = '\0'; | |
| 652 return retval; | |
| 653 } | |
| 801 | 654 } |
| 655 } | |
| 656 | |
| 3536 | 657 std::string |
| 3523 | 658 undo_string_escapes (const std::string& s) |
| 801 | 659 { |
| 3523 | 660 std::string retval; |
| 801 | 661 |
| 1755 | 662 for (size_t i = 0; i < s.length (); i++) |
| 663 retval.append (undo_string_escape (s[i])); | |
| 801 | 664 |
| 1755 | 665 return retval; |
| 801 | 666 } |
| 667 | |
| 1957 | 668 DEFUN (undo_string_escapes, args, , |
| 3361 | 669 "-*- texinfo -*-\n\ |
| 670 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ | |
| 671 Converts special characters in strings back to their escaped forms. For\n\ | |
| 672 example, the expression\n\ | |
| 673 \n\ | |
| 674 @example\n\ | |
| 675 bell = \"\\a\";\n\ | |
| 676 @end example\n\ | |
| 677 \n\ | |
| 678 @noindent\n\ | |
| 679 assigns the value of the alert character (control-g, ASCII code 7) to\n\ | |
| 680 the string variable @code{bell}. If this string is printed, the\n\ | |
| 681 system will ring the terminal bell (if it is possible). This is\n\ | |
| 682 normally the desired outcome. However, sometimes it is useful to be\n\ | |
| 683 able to print the original representation of the string, with the\n\ | |
| 684 special characters replaced by their escape sequences. For example,\n\ | |
| 685 \n\ | |
| 686 @example\n\ | |
| 687 octave:13> undo_string_escapes (bell)\n\ | |
| 688 ans = \\a\n\ | |
| 689 @end example\n\ | |
| 690 \n\ | |
| 691 @noindent\n\ | |
| 692 replaces the unprintable alert character with its printable\n\ | |
| 693 representation.\n\ | |
| 694 @end deftypefn") | |
| 801 | 695 { |
| 2086 | 696 octave_value retval; |
| 801 | 697 |
| 698 int nargin = args.length (); | |
| 699 | |
| 3103 | 700 if (nargin == 1) |
| 701 { | |
| 702 if (args(0).is_string ()) | |
| 703 retval = undo_string_escapes (args(0).string_value ()); | |
| 704 else | |
| 705 error ("undo_string_escapes: argument must be a string"); | |
| 706 } | |
| 801 | 707 else |
| 5823 | 708 print_usage (); |
| 801 | 709 |
| 710 return retval; | |
| 711 } | |
| 712 | |
| 5465 | 713 DEFUNX ("errno", Ferrno, args, , |
| 3716 | 714 "-*- texinfo -*-\n\ |
| 5465 | 715 @deftypefn {Built-in Function} {@var{err} =} errno ()\n\ |
| 716 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{val})\n\ | |
| 717 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{name})\n\ | |
| 718 Return the current value of the system-dependent variable errno,\n\ | |
| 719 set its value to @var{val} and return the previous value, or return\n\ | |
| 720 the named error code given @var{name} as a character string, or -1\n\ | |
| 721 if @var{name} is not found.\n\ | |
| 3716 | 722 @end deftypefn") |
| 723 { | |
| 724 octave_value retval; | |
| 725 | |
| 5465 | 726 int nargin = args.length (); |
| 727 | |
| 728 if (nargin == 1) | |
| 729 { | |
| 730 if (args(0).is_string ()) | |
| 731 { | |
| 732 std::string nm = args(0).string_value (); | |
| 733 | |
| 734 if (! error_state) | |
| 735 retval = octave_errno::lookup (nm); | |
| 736 else | |
| 737 error ("errno: expecting character string argument"); | |
| 738 } | |
| 739 else | |
| 740 { | |
| 741 int val = args(0).int_value (); | |
| 742 | |
| 743 if (! error_state) | |
| 744 retval = octave_errno::set (val); | |
| 745 else | |
| 746 error ("errno: expecting integer argument"); | |
| 747 } | |
| 748 } | |
| 749 else if (nargin == 0) | |
| 750 retval = octave_errno::get (); | |
| 3716 | 751 else |
| 5823 | 752 print_usage (); |
| 3716 | 753 |
| 754 return retval; | |
| 755 } | |
| 756 | |
| 5465 | 757 DEFUN (errno_list, args, , |
| 758 "-*- texinfo -*-\n\ | |
| 759 @deftypefn {Built-in Function} {} errno_list ()\n\ | |
| 760 Return a structure containing the system-dependent errno values.\n\ | |
| 761 @end deftypefn") | |
| 762 { | |
| 763 octave_value retval; | |
| 764 | |
| 765 if (args.length () == 0) | |
| 766 retval = octave_errno::list (); | |
| 767 else | |
| 5823 | 768 print_usage (); |
| 5465 | 769 |
| 770 return retval; | |
| 771 } | |
| 3716 | 772 |
| 2285 | 773 static void |
| 5275 | 774 check_dimensions (octave_idx_type& nr, octave_idx_type& nc, const char *warnfor) |
| 3354 | 775 { |
| 776 if (nr < 0 || nc < 0) | |
| 777 { | |
| 5781 | 778 warning_with_id ("Octave:neg-dim-as-zero", |
| 779 "%s: converting negative dimension to zero", warnfor); | |
| 3354 | 780 |
| 4457 | 781 nr = (nr < 0) ? 0 : nr; |
| 782 nc = (nc < 0) ? 0 : nc; | |
| 3354 | 783 } |
| 784 } | |
| 785 | |
| 786 void | |
| 4513 | 787 check_dimensions (dim_vector& dim, const char *warnfor) |
| 4481 | 788 { |
| 789 bool neg = false; | |
| 790 | |
| 791 for (int i = 0; i < dim.length (); i++) | |
| 792 { | |
| 793 if (dim(i) < 0) | |
| 794 { | |
| 795 dim(i) = 0; | |
| 796 neg = true; | |
| 797 } | |
| 798 } | |
| 799 | |
| 5781 | 800 if (neg) |
| 801 warning_with_id ("Octave:neg-dim-as-zero", | |
| 802 "%s: converting negative dimension to zero", warnfor); | |
| 4481 | 803 } |
| 804 | |
| 805 | |
| 806 void | |
| 807 get_dimensions (const octave_value& a, const char *warn_for, | |
| 4513 | 808 dim_vector& dim) |
| 4481 | 809 { |
| 810 if (a.is_scalar_type ()) | |
| 811 { | |
| 812 dim.resize (2); | |
| 4732 | 813 dim(0) = a.int_value (); |
| 4481 | 814 dim(1) = dim(0); |
| 815 } | |
| 816 else | |
| 817 { | |
| 5275 | 818 octave_idx_type nr = a.rows (); |
| 819 octave_idx_type nc = a.columns (); | |
| 4481 | 820 |
| 821 if (nr == 1 || nc == 1) | |
| 822 { | |
| 823 Array<double> v = a.vector_value (); | |
| 824 | |
| 825 if (error_state) | |
| 826 return; | |
| 827 | |
| 5275 | 828 octave_idx_type n = v.length (); |
| 4481 | 829 dim.resize (n); |
| 5275 | 830 for (octave_idx_type i = 0; i < n; i++) |
| 4783 | 831 dim(i) = static_cast<int> (fix (v(i))); |
| 4481 | 832 } |
| 833 else | |
| 5257 | 834 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
| 4481 | 835 } |
| 836 | |
| 5258 | 837 if (! error_state) |
| 838 check_dimensions (dim, warn_for); // May set error_state. | |
| 4481 | 839 } |
| 840 | |
| 841 | |
| 842 void | |
| 3354 | 843 get_dimensions (const octave_value& a, const char *warn_for, |
| 5275 | 844 octave_idx_type& nr, octave_idx_type& nc) |
| 3354 | 845 { |
| 846 if (a.is_scalar_type ()) | |
| 847 { | |
| 4732 | 848 nr = nc = a.int_value (); |
| 3354 | 849 } |
| 850 else | |
| 851 { | |
| 852 nr = a.rows (); | |
| 853 nc = a.columns (); | |
| 854 | |
| 855 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) | |
| 856 { | |
| 3419 | 857 Array<double> v = a.vector_value (); |
| 3354 | 858 |
| 859 if (error_state) | |
| 860 return; | |
| 861 | |
| 5275 | 862 nr = static_cast<octave_idx_type> (fix (v (0))); |
| 863 nc = static_cast<octave_idx_type> (fix (v (1))); | |
| 3354 | 864 } |
| 865 else | |
| 5257 | 866 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
| 3354 | 867 } |
| 868 | |
| 5258 | 869 if (! error_state) |
| 870 check_dimensions (nr, nc, warn_for); // May set error_state. | |
| 3354 | 871 } |
| 872 | |
| 873 void | |
| 874 get_dimensions (const octave_value& a, const octave_value& b, | |
| 5275 | 875 const char *warn_for, octave_idx_type& nr, octave_idx_type& nc) |
| 3354 | 876 { |
| 4732 | 877 nr = a.is_empty () ? 0 : a.int_value (); |
| 878 nc = b.is_empty () ? 0 : b.int_value (); | |
| 3354 | 879 |
| 880 if (error_state) | |
| 881 error ("%s: expecting two scalar arguments", warn_for); | |
| 882 else | |
| 883 check_dimensions (nr, nc, warn_for); // May set error_state. | |
| 884 } | |
| 885 | |
| 4478 | 886 Matrix |
| 5275 | 887 identity_matrix (octave_idx_type nr, octave_idx_type nc) |
| 4478 | 888 { |
| 889 Matrix m (nr, nc, 0.0); | |
| 890 | |
| 891 if (nr > 0 && nc > 0) | |
| 892 { | |
| 5275 | 893 octave_idx_type n = std::min (nr, nc); |
| 4478 | 894 |
| 5275 | 895 for (octave_idx_type i = 0; i < n; i++) |
| 4478 | 896 m (i, i) = 1.0; |
| 897 } | |
| 898 | |
| 899 return m; | |
| 900 } | |
| 901 | |
| 3620 | 902 extern int |
| 3622 | 903 octave_format (std::ostream& os, const char *fmt, ...) |
| 3620 | 904 { |
| 905 int retval = -1; | |
| 906 | |
| 907 va_list args; | |
| 908 va_start (args, fmt); | |
| 909 | |
| 910 retval = octave_vformat (os, fmt, args); | |
| 911 | |
| 912 va_end (args); | |
| 913 | |
| 914 return retval; | |
| 915 } | |
| 916 | |
| 917 extern int | |
| 3622 | 918 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
| 3620 | 919 { |
| 920 int retval = -1; | |
| 921 | |
| 3775 | 922 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
| 3620 | 923 |
| 4135 | 924 std::streambuf *sb = os.rdbuf (); |
| 925 | |
| 926 if (sb) | |
| 4302 | 927 { |
| 928 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 929 | |
| 930 retval = sb->vform (fmt, args); | |
| 931 | |
| 932 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 933 } | |
| 3620 | 934 |
| 935 #else | |
| 936 | |
| 937 char *s = octave_vsnprintf (fmt, args); | |
| 938 | |
| 939 if (s) | |
| 940 { | |
| 941 os << s; | |
| 942 | |
| 943 retval = strlen (s); | |
| 944 } | |
| 945 | |
| 946 #endif | |
| 947 | |
| 948 return retval; | |
| 949 } | |
| 950 | |
| 5775 | 951 /* FIXME -- we really need a configure test for this. */ |
| 4302 | 952 |
| 6694 | 953 #if defined __GNUC__ && __GNUC__ >= 3 && ! defined __MINGW32__ |
| 4302 | 954 #define HAVE_C99_VSNPRINTF 1 |
| 955 #endif | |
| 956 | |
| 957 // We manage storage. User should not free it, and its contents are | |
| 958 // only valid until next call to vsnprintf. | |
| 959 | |
| 960 // Interrupts might happen if someone makes a call with something that | |
| 961 // will require a very large buffer. If we are interrupted in that | |
| 962 // case, we should make the buffer size smaller for the next call. | |
| 963 | |
| 964 #define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF \ | |
| 965 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \ | |
| 966 delete [] buf; \ | |
| 967 buf = 0; \ | |
| 968 size = initial_size; \ | |
|
7481
78f3811155f7
use exceptions in liboctave error handler
John W. Eaton <jwe@octave.org>
parents:
7017
diff
changeset
|
969 octave_rethrow_exception (); \ |
| 4302 | 970 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 |
| 971 | |
| 4485 | 972 #if defined __GNUC__ && defined __va_copy |
| 973 #define SAVE_ARGS(saved_args, args) __va_copy (saved_args, args) | |
| 974 #elif defined va_copy | |
| 975 #define SAVE_ARGS(saved_args, args) va_copy (saved_args, args) | |
| 976 #else | |
| 977 #define SAVE_ARGS(saved_args, args) saved_args = args | |
| 978 #endif | |
| 979 | |
| 4302 | 980 char * |
| 981 octave_vsnprintf (const char *fmt, va_list args) | |
| 982 { | |
| 983 static const size_t initial_size = 100; | |
| 984 | |
| 985 static size_t size = initial_size; | |
| 986 | |
| 987 static char *buf = 0; | |
| 988 | |
| 4482 | 989 #if defined (HAVE_C99_VSNPRINTF) |
| 990 size_t nchars; | |
| 991 #else | |
| 4351 | 992 int nchars; |
| 4482 | 993 #endif |
| 4302 | 994 |
| 995 if (! buf) | |
| 996 buf = new char [size]; | |
| 997 | |
| 998 if (! buf) | |
| 999 return 0; | |
| 1000 | |
| 1001 #if defined (HAVE_C99_VSNPRINTF) | |
| 1002 | |
| 4485 | 1003 // Note that the caller is responsible for calling va_end on args. |
| 1004 // We will do it for saved_args. | |
| 1005 | |
| 1006 va_list saved_args; | |
| 1007 | |
| 1008 SAVE_ARGS (saved_args, args); | |
| 1009 | |
| 4302 | 1010 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
| 1011 | |
| 1012 nchars = octave_raw_vsnprintf (buf, size, fmt, args); | |
| 1013 | |
| 1014 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1015 | |
| 1016 if (nchars >= size) | |
| 1017 { | |
| 1018 size = nchars + 1; | |
| 1019 | |
| 1020 delete [] buf; | |
| 1021 | |
| 1022 buf = new char [size]; | |
| 1023 | |
| 1024 if (buf) | |
| 1025 { | |
| 1026 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; | |
| 1027 | |
| 4485 | 1028 octave_raw_vsnprintf (buf, size, fmt, saved_args); |
| 4302 | 1029 |
| 1030 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1031 } | |
| 1032 } | |
| 1033 | |
| 4485 | 1034 va_end (saved_args); |
| 1035 | |
| 4302 | 1036 #else |
| 1037 | |
| 1038 while (1) | |
| 1039 { | |
| 4485 | 1040 va_list saved_args; |
| 1041 | |
| 1042 SAVE_ARGS (saved_args, args); | |
| 1043 | |
| 4302 | 1044 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
| 1045 | |
| 4485 | 1046 nchars = octave_raw_vsnprintf (buf, size, fmt, saved_args); |
| 1047 | |
| 1048 va_end (saved_args); | |
| 4302 | 1049 |
| 1050 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; | |
| 1051 | |
| 4351 | 1052 if (nchars > -1 && nchars < size-1) |
| 4302 | 1053 return buf; |
| 1054 else | |
| 1055 { | |
| 1056 delete [] buf; | |
| 1057 | |
| 1058 size *= 2; | |
| 1059 | |
| 1060 buf = new char [size]; | |
| 1061 | |
| 1062 if (! buf) | |
| 1063 return 0; | |
| 1064 } | |
| 1065 } | |
| 1066 | |
| 1067 #endif | |
| 1068 | |
| 1069 return buf; | |
| 1070 } | |
| 1071 | |
| 1072 char * | |
| 1073 octave_snprintf (const char *fmt, ...) | |
| 1074 { | |
| 1075 char *retval = 0; | |
| 1076 | |
| 1077 va_list args; | |
| 1078 va_start (args, fmt); | |
| 1079 | |
| 1080 retval = octave_vsnprintf (fmt, args); | |
| 1081 | |
| 1082 va_end (args); | |
| 1083 | |
| 1084 return retval; | |
| 1085 } | |
| 1086 | |
| 4086 | 1087 void |
| 1088 octave_sleep (double seconds) | |
| 1089 { | |
| 1090 if (seconds > 0) | |
| 1091 { | |
| 1092 double t; | |
| 1093 | |
| 4093 | 1094 unsigned int usec |
| 4783 | 1095 = static_cast<unsigned int> (modf (seconds, &t) * 1000000); |
| 4086 | 1096 |
| 4093 | 1097 unsigned int sec |
| 4783 | 1098 = (t > UINT_MAX) ? UINT_MAX : static_cast<unsigned int> (t); |
| 4086 | 1099 |
| 5770 | 1100 // Versions of these functions that accept unsigned int args are |
| 1101 // defined in cutils.c. | |
| 4086 | 1102 octave_sleep (sec); |
| 1103 octave_usleep (usec); | |
| 1104 } | |
| 1105 } | |
| 1106 | |
| 572 | 1107 /* |
| 1 | 1108 ;;; Local Variables: *** |
| 1109 ;;; mode: C++ *** | |
| 1110 ;;; End: *** | |
| 1111 */ |